<template>
  <div class="login-container">
    <!-- 导航栏 -->
    <van-nav-bar class="page-nav-bar" title="登录" >
      <van-icon slot="left" name="cross"
      @click="$router.back()"
      ></van-icon>
    </van-nav-bar>
    
    <!-- /导航栏 -->

    <!-- 登录表单 -->
    <!--
      表单验证：
        1、给 van-field 组件配置 rules 验证规则
          参考文档：https://youzan.github.io/vant/#/zh-CN/form#rule-shu-ju-jie-gou
        2、当表单提交的时候会自动触发表单验证
           如果验证通过，会触发 submit 事件
           如果验证失败，不会触发 submit
     -->
    <van-form ref="loginInForm" @submit="onSubmit">
      <van-field v-model="user.mobile" name="mobile" placeholder="请输入手机号"
      :rules="userFormRules.mobile"
      type='number' maxlength='11'>
        <i slot="left-icon" class="toutiao toutiao-shouji"></i>
      </van-field>
      <van-field v-model="user.code" name="code" placeholder="请输入验证码"
      :rules="userFormRules.code"  type='number' maxlength='6'>
        <i slot="left-icon" class="toutiao toutiao-yanzhengma"></i>
        <template #button>
          <!-- 倒计时 time倒计时的时间 -->
          <van-count-down v-if="isCountDownShow" 
          @finish='isCountDownShow = false'
          :time="1000*60" format='ss s' />
          <van-button v-else  class="send-sms-btn" round size="mini" 
          type="default" native-type="button"
            @click="onSendms">发送验证码</van-button
          >
        </template>
      </van-field>
      <div class="login-btn-wrap">
        <van-button class="login-btn" block type="info" native-type="submit">
          登录
        </van-button>
      </div>
    </van-form>
    <!-- /登录表单 -->
     <div class="tips" ><p >电话随便写 验证码248610</p></div>
  </div>
 
</template>

<script>
import { login,sendSms } from "@/api/user";

export default {
  name: "LoginIndex",
  components: {},
  props: {},
  data() {
    return {
      user: {
        mobile: "", // 手机号
        code: "", // 验证码
      },
       userFormRules: {
        mobile: [{
          required: true,
          message: '手机号不能为空'
        }, {
          pattern: /^1[3|5|7|8]\d{9}$/,
          message: '手机号格式错误'
        }],
        code: [{
          required: true,
          message: '验证码不能为空'
        }, {
          pattern: /^\d{6}$/,
          message: '验证码格式错误'
        }]
      },
         isCountDownShow: false // 是否展示倒计时
    };
  },
  computed: {},
  watch: {},
  created() {},
  mounted() {},
  methods: {
    async onSubmit() {
      // 1. 获取表单数据
      const user = this.user;

      // TODO: 2. 表单验证
      // 在组件中必须通过this.$toast 来调用Toast
     this.$toast.loading({
        message: '登录中...',
        forbidClick: true, // 禁用背景点击
        duration: 0 // 持续时间，默认 2000，0 表示持续展示不关闭
      })

      // 3. 提交表单请求登录
      try {
        const {data}= await login(user);
       this.$toast.success('登陆成功')
       this.$store.commit('setUser',data.data)
      //  登陆成功跳转回原来页面
      // back不严谨
      this.$router.back()
      } catch (err) {
        if (err.response.status === 400) {
        this.$toast.fail('手机号或验证码错误')
        } else {
          this.$toast.fail('登录失败，请稍后重试')
        }
      }

      // 4. 根据请求响应结果处理后续操作
    },
    // 发送验证码
    async onSendms(){
      // 校验手机号
      try {
       await this.$refs.loginInForm.validate('mobile')
      } catch (error) {
       return this.$toast('验证失败',error)
      }
      this.isCountDownShow = true
      
      // 验证通过，倒计时
      // 请求发送验证码  /v1_0/sms/codes/:mobile  
  try {
      const res = await sendSms(this.user.mobile)
      console.log('发送成功',res);
  } catch (error) {
    // 发送失败关闭倒计时
    this.isCountDownShow = false
    console.log('发送失败',error);
    if(error.response.status ===429){
      this.$toast('发送太频繁了，稍后重试')
    }else{
      this.$toast('发送失败')
    }
  }
    }
  },
};
</script>

<style scoped lang="less">
.login-container {
  .toutiao {
    font-size: 37px;
  }

  .send-sms-btn {
    width: 152px;
    height: 46px;
    line-height: 46px;
    background-color: #ededed;
    font-size: 22px;
    color: #666;
  }

  .login-btn-wrap {
    padding: 53px 33px;
    .login-btn {
      background-color: #6db4fb;
      border: none;
    }
  }
  .tips{
    display: flex;
    justify-content: center;
    height: 30px;
    p{
      font-size: 12px;
    }
  }
}
</style>
